RS-12 Full Exhaust for CRF450R: What to Expect
By Yoshimura R&D of America, Inc. | Published: 2026-10-29
Category: Product Reviews
A practical look at the Yoshimura RS-12evo Signature Series SS/TI exhaust for the 2027 Honda CRF450R, including what it delivers, who it's for, and the trade-offs to consider.
Quick Answer
The Yoshimura RS-12evo Signature Series SS/TI system is a high-performance full exhaust for the 2027 Honda CRF450R that combines a stainless steel header with a titanium muffler to deliver notable power gains without the full titanium price tag.
What Makes the RS-12evo Different
The RS-12evo Signature Series system (formerly called the Hybrid) pairs a stainless steel header with a titanium muffler. This gives you the weight savings and sound of a titanium can with the durability and lower cost of a stainless steel front section. It's a middle ground that many riders find practical for both track and trail use.
Yoshimura engineers designed this system specifically for the 2027 CRF450R, so fitment is direct and no major modifications are needed. The system includes a new muffler and all necessary hardware for installation.
Trade-Offs to Consider
While the RS-12evo offers strong performance gains, it's not the lightest option available. If you're chasing every ounce of weight savings for serious racing, a full titanium system like the RS-12evo TI might be a better fit. The SS/TI version also costs less than a full titanium system, but it's still a premium upgrade—budget accordingly.
Also note that this is a full exhaust replacement, not a slip-on. Installation requires removing the stock header and mid-pipe, which takes more time and mechanical skill. If you're not comfortable with that, plan to have a shop do the install.
Decision Rules for the RS-12evo
- Choose the RS-12evo SS/TI if...: You want the performance of a full titanium system but prefer to save money and keep a stainless steel header for durability. This is ideal for riders who ride mixed terrain or want a system that lasts longer under hard use.
- Skip the RS-12evo SS/TI if...: Weight is your top priority and you're willing to pay more for a full titanium system. The RS-12evo TI version saves additional grams and might be worth the extra cost for serious racers. If you're racing competitively, compare the weight difference between the SS/TI and full TI versions before deciding.
- Installation note: This is a full exhaust system, not a slip-on. Expect to remove the stock header and mid-pipe. Basic mechanical skills and tools are required. If you're unsure, have a professional install it. Check your local emissions laws before purchasing—full exhausts may not be street-legal in all areas.
Product Facts
- CRF450R 2027 RS-12 Stainless Titanium Full Exhaust, w/ Titanium Muffler: The RS-12evo Signature Series SS/TI system is designed by the engineers that know the Honda CRF450R best, and it packs the power of the full titanium RS-12evo system at a lower price point. You get near-top-tier performance gains without paying for a full titanium system, making this a smart value for riders who want race-level power on a budget.
CRF450R 2027 RS-12 Stainless Titanium Full Exhaust, w/ Titanium Muffler
Who Should Buy This Exhaust
Best for
- Riders who want a significant power increase without the full titanium price
- Owners of the 2027 CRF450R who want a direct-fit, engineered upgrade from a brand that knows the platform
Not for
- Riders who need the absolute lightest exhaust for competitive racing
- Those looking for a simple slip-on upgrade—this requires full system installation
